Which of the Following Is a Reasonable Way to Explain

question 6

Multiple Choice

Which of the following is a reasonable way to explain the ability of enhancers to act at a distance?

• A)The activator binds to an enhancer,changing the supercoiling state of the DNA and opening up the promoter to general transcription factors.
• B)The activator binds to an enhancer,slides along the DNA until it encounters the promoter,and activates transcription.
• C)An activator binds to an enhancer,creating loops in the DNA,which leads to the interaction of proteins at the promoter and activation of transcription.
• D)An activator binds to an enhancer and a downstream segment to form a loop,which causes the protein to track toward the promoter and activate transcription.
• E)All of the choices explanations are possible.

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